Spectra Antibacterial Nano Silver Ice PackThe material from which the bag is made prevents the propagation of the microbes. How to useput the bag in the freezer and leave for at least 5 hours. The product keeps you cool 2-3 times longer than ice. To maintain a low temperature, place the ice bag near the container.Before usefill the pack with water until the water indicator, the auto shut-off valve will seal the pack completely, freeze for at least 5 hours & Reusable
